Off the shelf wheels over ls brakes on a 69 camaro?

[69greyghost]

Hey guys, what wheels will fit off the shelf on a 69 camaro with ls brakes on all four points? I want either a 18x18 10 inch wide in the rear or a 19x20 or 21. All will be 10 inch wide in the rear. I have the boss 338 in mind but I want to see all my options. I DO NOT want spacers of any kind. I guess adapters maybe but wanna stay away from those things. Thanks in advance guys for the help.